We started because DD showed signs and wanted to use a friends potty

We bought the $8.00 basic pottys from T, I just got another the other day so we have one upstairs and downstairs now we just had it in the bathroom and she sits on it morning and night and during the day if she asks, we rememebr or we are at home, when she wakes from her mid day nap she goes on as well.

We found the following things have helped, sitting on the toilet at the same time, talking to her about it. Giving DD books and toys to play with that she only has at potty time, if she does a wee or Poo we congratulations her, and say what she has done. She now asks for the potty, even in the middle of the night so it's always fun sitting up in the middle of the night while she goes, and it can take a while sometimes she won't poo in a nappy, although she did when she was sick a few days ago.

So I guess get a cheapy one for on the floor, and she might start to emulate you, but if not give it a few more months, I was really surprised when DD started, it was of her own accord, so Missy might not be quite ready yet.

Goodluck!!